Filter
Top Products
Adjustments
52
P6330 3.5 GHz Differential Probe Instruction Manual
12. Calc ulate the common-mode gain (A
CM
) as follows:
(V
out
1--V
out
2) ÷ (V
in
1--V
in
2).
13. Calculate the CMRR as follows: 20 log (0.2/|A
CM
|)
14. Reveri fy tha t the offset is 0 V, ±3.0 mV (repeat steps 1
through 3). If the offset voltage magnitude is greater than 3.0 mV,
or if the CMRR is less than 60 dB, disconne ct the probe from the
test circuit. Repeat the procedure, beginning wit h step 1 on
page 50, to compensate for the adjustment interaction.